Meaning of euthanasia: Intention is what the definitions turn on, which is why several superficially similar practices near the end of life are classified separately.

Definition of euthanasia

Euthanasia is the deliberate act of ending a person's life in order to relieve suffering from an incurable or severely painful condition, typically at that person's own request. The defining element is the intention to cause death as the means of relief. Laws governing it differ sharply between jurisdictions, and it is prohibited in most.

What distinguishes it from other end-of-life practices?

PracticeWho performs the final actWhat is intended
EuthanasiaAnother person, usually a clinicianTo cause death in order to end suffering
Assisted dying or assisted suicideThe person themselves, with the means providedTo cause death in order to end suffering
Withdrawing or withholding treatmentNo act causing death; support is stopped or not begunTo stop treatment that is unwanted or no longer of benefit
Palliative sedationMedication given to relieve symptomsTo relieve suffering, not to shorten life

These distinctions rest on who acts and on what is intended, not on how ill the person is. Stopping a ventilator or artificial parenteral nutrition allows an underlying illness to take its course, so the illness causes death and the decision is to stop intervening in it. That is treated as legally and ethically different from an act performed in order to cause death, however similar the timing may look from outside.

What do voluntary, non-voluntary and involuntary mean here?

These words describe consent and are used precisely in ethical and legal discussion. Voluntary means the person requested it while competent to do so. Non-voluntary means the person was unable to express any wish, as with an infant or someone permanently unconscious, and a decision was made by others. Involuntary means it was carried out against the person's expressed wishes, which is regarded as unlawful killing rather than euthanasia in any acceptable sense. A separate division is drawn between active euthanasia, an act performed to cause death, and passive euthanasia, a phrase some writers apply to withholding treatment. Many clinicians and ethicists reject that second phrase as misleading, precisely because it blurs the distinction drawn above.

Why does the word cause confusion?

Three reasons recur. In ordinary use it sometimes means nothing more than a peaceful death, carrying none of the technical meaning. In veterinary practice it describes the routine ending of an animal's life, which shapes public expectations of the term. And terminology differs across jurisdictions, with medical aid in dying, assisted dying and voluntary assisted dying all naming arrangements that are not identical to one another. Palliative care is separate again, aiming to relieve symptoms and improve quality of life without any intention of shortening it, and it is available regardless of what the law in a given place permits.

Also known as

mercy killing

Used in a sentence

The ethics committee reviewed the jurisdiction's specific legal framework governing euthanasia before the family's inquiry was addressed.

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Good to know

Euthanasia, the deliberate act of ending a life, is treated as legally and ethically distinct from withdrawing life sustaining treatment, which instead allows an underlying illness to progress without an additional act intended to cause death.

Word origin

Where “euthanasia” comes from

Formed from Greek eu-, meaning good, and thanatos, meaning death, together suggesting a good or easy death.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.